Detachment

Emotional detachment, in psychology, can mean two different things. In the first meaning, it refers to an "inability to connect" with others emotionally, as well as a means of dealing with anxiety by preventing certain situations that trigger it; it is often described as "emotional numbing" or dissociation, depersonalization or in its chronic form depersonalization disorder. In the second sense, it is a decision to avoid engaging emotional connections, rather than an inability or difficulty in doing so, typically for personal, social, or other reasons. In this sense it can allow people to maintain boundaries, psychic integrity and avoid undesired impact by or upon others, related to emotional demands. http://en.wikipedia.org/wiki/Emotional_detachment

Detachment, also expressed as Non Attachment, is a state in which a person overcomes his or her attachment to desire for things, people or concepts of the world and thus attains a heightened perspective. http://en.wikipedia.org/wiki/Detachment_(philosophy)

cf DisEngagement, Buddhism, Minimalism